JP3860783B2 - Existing structure covering member and existing structure covering method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is primarily repaired surface portion of the existing concrete structures, integrity and to existing structures covering member and existing structures coating process used for purposes such as appearance repair.
[0002]
[Prior art]
The existing concrete structure is subject to structural deterioration such as chemical corrosion and salt damage including alkali-aggregate reaction and neutralization due to various factors over a long period of time after construction. Deterioration in appearance is also observed due to environmental and biological factors such as moss. For such structural deterioration and appearance deterioration of existing concrete structures, measures such as washing and repainting may be adopted, but none of these were permanent. .
[0003]
As a permanent technical means, conventionally, a base fabric made of a fiber base that should be bonded to a structure through a mortar that is a solidifying material and an outer side of the base fabric are bonded with an adhesive. Although there was a laminated sheet for covering existing structures consisting of a coating layer containing fluorine, the inside of the base fabric was not saturated with mortar during adhesion, and an air layer remained inside the base fabric. There was a problem that the laminated sheet was easily peeled off from the structure.
[0004]
Therefore, there is a laminated sheet for covering an existing structure invented by the present inventors as a technical means capable of preventing deterioration of the structure and maintaining its appearance over a long period of time after coating.
[0005]
This is provided with protrusions made of fiber-like or flocked fiber material, mesh-like knitted fabric, mineral particles or synthetic resin particles on the inside, and the solidified material is filled around the protrusions without any gaps. The resin layer is fixed to the structure in a state, and the outermost layer is composed of one or more coating layers having an antifouling function.
[0006]
[Problems to be solved by the invention]
However, such a laminated sheet for covering an existing structure, unlike a member having rigidity such as a tile, is composed of a sheet member that is soft and can be freely deformed. Therefore, sufficient flatness is provided on the outer surface of the coating layer. It may be difficult to ensure.
[0007]
In addition, in order to ensure sufficient flatness on the outer surface of the coating layer, it is assumed that sufficient flatness is ensured on the outer surface of the solidified material. Necessary. However, in recent years, there is a shortage of skilled workers who can realize such plastering work, and the construction cost is inevitably increased.
[0008]
Accordingly, an object of the present invention is to facilitate and enhance repair, maintenance, and appearance repair of the surface portion of a structure with a laminated sheet so that the flatness on the outer surface of the coating layer and the effect of reducing the construction cost can be sufficiently obtained. It is to provide an existing structure covering member and existing structures coating manner it is possible to perform accuracy.
[0009]
[Means for Solving the Problems]
That is, the present invention is configured as including the first invention and the second invention. First invention has according to the existing structures covering member, the second invention is according to existing structures coating process.
[0010]
Existing structures covering member according to the first invention, repair of the surface portion of the existing structures, and is applied in performing a coating of existing structures for the purpose of such protection and appearance repair.
[0011]
This is because a protrusion is provided on the inner side, and a solidified material is filled around the protrusion without gaps, and the resin layer is fixed to an existing structure, and is fixed to the outer side of the resin layer via an adhesive. The outer side surface of the laminated sheet composed of the coating layer is detachably attached to the inner side surface of the formwork plate member via an adhesive .
In addition, the coating layer is comprised as one or more layers in which the outermost layer has a dirt prevention function.
[0012]
According to existing structures covering member according to this first invention, including a feature point on the structure formed by attaching removably to the inner surface of the soft deformable free dam outer surface of the laminated sheet Since it is comprised as a thing, it becomes possible to perform repair of the surface part of the existing structure by a lamination sheet, maintenance, external appearance repair, etc. easily and with high precision.
[0013]
Therefore, according to this, the flatness in the outer surface of the coating layer and the effect of reducing the construction cost can be sufficiently obtained.
[0014]
On the other hand, the existing structure covering method according to the second invention is a method applied when covering an existing structure for the purpose of repairing, maintaining, and restoring the appearance of the surface portion of the existing structure.
[0015]
This is configured as a method including the following steps.
[0016]
That is, a protrusion is provided on the inner side, and a resin layer fixed to the structure in a state where the solidified material is filled around the protrusion without a gap, and is fixed to the outer side of the resin layer via an adhesive. After the preparatory work for constructing the existing structure covering member by detachably attaching the outer side surface of the laminated sheet comprising the coating layer to the inner side surface of the formwork plate member , with a gap from the surface, the existing structures covering member, the mold member disposing step of the side on which the laminated sheet is adhered to place in a state of facing the existing structures side.
[0017]
And after a formwork member arrangement | positioning process, it is a solidification material filling process which fills a clearance gap with a solidification material.
[0018]
According to such an existing structure covering method according to the second aspect of the present invention, a formwork is performed using a formwork panel in which the outer side surface of a soft and deformable laminated sheet is detachably attached to the inner side surface of a dam plate. Since it is configured to include a solidifying material filling step after the member arranging step, it is possible to easily and highly accurately repair, maintain, and repair the appearance of the surface portion of the existing structure with the laminated sheet.
[0019]
Therefore, according to this, the flatness in the outer surface of the coating layer and the effect of reducing the construction cost can be sufficiently obtained.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0021]
[Existing structures covering member (1)]
Figure 1 is a sectional view showing the configuration of existing structures covering member according to an embodiment of the present invention, FIG. 2 is a front view showing an external configuration of the structure to which the existing structures covering member is applied It is.
[0022]
In this embodiment, existing structures covering member 1, existing concrete structures repaired surface portion of the existing concrete structure 31 as metro station (see FIGS. 3 to 6), integrity and appearance repair such purposes This is applied when the object 31 is coated.
[0023]
Specifically, the existing structures covering member 1, as shown in FIG. 1, which the outer surface of the laminated sheet 1a of existing structures for coating, formed by adhering the inner surface of the end plate 1b It is comprised as follows, and consists of the laminated sheet 1a for existing structure covering, and the dam plate 1b.
[0024]
Hereinafter, each of these components will be described in more detail.
[0025]
<Laminated sheet 1a for covering existing structure>
In the present embodiment, the laminated sheet 1a for covering the existing structure is applied to the covering of the existing concrete structure 31 for the purpose of repairing, maintaining and restoring the appearance of the surface portion of the existing concrete structure 31. .
[0026]
Specifically, the laminated sheet 1 a for covering existing structures is composed of a resin layer 11 and a coating layer 13 .
[0027]
Hereinafter, each of these components will be described in more detail.
[0028]
(1) Resin layer 11
The resin layer 11 is configured to include a synthetic resin sheet and a protrusion 11a made of a flocked fiber material provided inside the synthetic resin sheet.
The resin layer 11 is not limited to the one including the protrusions 11a made of a flocked fiber material, but is made of a protrusion made of a fiber-like fiber material, a protrusion made of a mesh knitted fabric, a mineral It may include a protrusion made of particles or synthetic resin particles.
[0029]
And such a resin layer 11 plays the role which adheres to the existing concrete structure 31 in the state with which the concrete 25 as a solidification material was filled without the clearance gap around the protrusion 11a which consists of a flock-like fiber material. It is configured as.
[0030]
Specifically, the protrusion 11a made of a flocked fiber material is configured by planting a flocking material made of a synthetic resin on a synthetic resin sheet to be described later. Further, the protrusion 11a made of a flock-like fiber material is preferably a rod-like monofilament fiber material, and is planted roughly and uniformly to such an extent that the flow of the concrete 25 immediately after the concrete 25 is placed in a sheet shape is not hindered. It is preferable.
[0031]
Here, the protrusion 11a made of the flocked fiber material in the resin layer 11 may be any material, but the flocked in the resin layer 11 made of at least one of synthetic fiber, inorganic fiber and metal fiber. By appropriately arranging the projections 11a made of a fibrous material as a structural member in the concrete 25, not only the maintenance of the existing concrete structure 31 but also the effect that can be expected to be actively acquired is ensured. .
[0032]
Moreover, from the viewpoint of obtaining a sufficient fixing effect between the laminated sheet 1 and the concrete 25, as the protrusion 11 a made of such a flocked fiber material completely bites into the concrete 25, It is preferable that at least an end portion of the flocked fiber material has a cocoon shape or a cocoon shape.
[0033]
The same effect can be obtained for protrusions made of a hair-like fiber material, which will be described later, and protrusions made of a mesh-like knitted fabric.
[0034]
That is, according to such a resin layer 11, since the voids are large enough to be filled with the concrete 25, a sufficient fixing effect between the laminated sheet 1 and the concrete 25 is obtained after the concrete 25 is solidified. It is done. Further, since these voids can be manipulated by increasing / decreasing the raw materials and increasing / decreasing the heating compression force, the resin layer 11 having voids of an appropriate size can be obtained according to the performance of the concrete 25 such as fluidity.
[0035]
By the way, when adopting a cement-based material such as mortar as the solidifying material, it is necessary to consider the influence of the alkalinity of the cement-based material on the protrusions. For example, when adopting a projection provided with synthetic resin particles, it is preferable to select one having alkali resistance, such as polyethylene resin, olefin resin such as polypropylene resin, ethylene propylene, etc.・ Materials suitable for polypropylene resin, vinyl acetate copolymer resin, urea resin, polyamide resin, vinyl acetate resin, vinyl chloride resin, etc. containing synthetic rubber components such as mixed resin composed of copolymer and polypropylene resin It becomes. On the other hand, when adopting the one provided with protrusions made of mineral particles, natural minerals having alkali resistance, such as single particles of recycled artificial minerals such as crushed concrete, brick crushed, tile crushed, etc. Alternatively, mixed particles are suitable materials.
[0036]
On the other hand, the synthetic resin sheet 12 is configured to be fixed to the outside of the resin layer 11. This employs a synthetic resin that is a plastic polymer compound widely used in civil engineering / building materials, electrical parts, industrial materials and the like.
[0037]
Therefore, the synthetic resin sheet 12 can be obtained from any existing synthetic resin sheet, is easy and light in molding and processing, and has excellent water resistance, oil resistance, and chemical resistance. It can be used as transparent or colored.
[0038]
Specifically, such a synthetic resin has alkali resistance, is softened once by heating, and then softens by forming a crosslinked (network) structure by a chemical reaction, but does not soften even when heated again. , Thermosetting resins that produce relatively low molecular weight resins such as phenolic resins, urea resins, melamine resins, epoxy resins, silicon resins, etc., and plastics that are softened by heating and show cooling A thermoplastic resin that has a property of solidifying and is a bifunctional or higher monomer such as polyethylene, polypropylene, polystyrene, ABS resin, vinyl chloride resin, nylon, fluororesin, or polycarbonate, and the molecule is linearly long. is there.
[0039]
On the other hand, such a synthetic resin sheet 12 is configured as a design 14 on the outer surface.
[0040]
That is, according to such a synthetic resin sheet 12, it is possible to express the design 14 such as characters, figures, patterns, colors and the like having a large aesthetic effect on the appearance, and further improve the appearance improvement effect of the existing concrete structure 31. It is possible to increase.
[0041]
As such a design 14, for example, coloring is performed on a thermoplastic resin, and a color shape is obtained by putting a pattern on a roll surface of a calendering machine that continuously squeezes the gap between the rolls and forms the sheet. It can be formed, or a sheet made of synthetic resin of thermoplastic resin is sandwiched between high frequency electrodes, a high frequency voltage is applied to heat the sheet, embossed and molded into an arbitrary shape by heat fusion You can also.
[0042]
According to such a resin layer 11, in the protrusion 11 a made of a flocked fiber material, the thread interval or the interval between the linear and thread-like objects is considerably wide and the structure is rough. It is sufficiently possible to saturate with concrete 25 such as.
[0043]
That is, according to such a resin layer 11, since it is comprised as a thing including the protrusion 11a which consists of such a flock-like fiber material in the part adhere | attached by the concrete 25, the concrete 25 is reliable and adherence at the time of adhesion | attachment. It will be sufficiently saturated, and even after the covering of the existing concrete structure 31 is completed, an air layer will not remain inside.
[0044]
Therefore, water vapor or gas moves along the interface between the existing concrete structure 31 and the laminated sheet 1, water vapor or gas generated from the existing concrete structure 31 expands in the vicinity of the air layer, or existing concrete structure. It is impossible for the laminated sheet 1 to peel off from the existing concrete structure 31 due to the inherent difference between the thermal expansion coefficients of the laminated sheet 1 and the laminated sheet 1.
[0045]
Therefore, according to this, the deterioration of the existing concrete structure 31 can be prevented and the appearance can be maintained for a long period after the covering, and the maintenance effect and the appearance improvement effect of the existing concrete structure 31 are unified. It is possible to obtain it reliably and sufficiently by one-time construction.
[0046]
(2) Coating layer 13
The coating layer 13 plays a role of being fixed to the outside of the synthetic resin sheet 12 via an adhesive.
[0047]
The outermost layer of the coating layer 13 in the present embodiment is configured to carry a photocatalyst.
[0048]
Specifically, the coating layer 13, although not shown, the fluororesin layer 11 formed on the inner side, are composed of an outer side photocatalyst layer formed on the photocatalyst layer is an adhesive And is fixed to the outside of the synthetic resin sheet 12.
[0049]
That is, according to such a coating layer 13 , it is possible to eliminate periodic cleaning work due to the antifouling, antibacterial, antifungal and other effects of the photocatalyst. It is possible to reduce the burden.
[0050]
Here, the photocatalyst contained in the photocatalyst layer is composed of a composite of at least one of metal oxide gel and metal hydroxide gel and photocatalyst particles.
[0051]
The layer portion made of the adhesive is made of at least one or more of a silicon-modified resin that is an acrylic-silicon resin, a silicon-modified resin containing polysiloxane, a silicon-modified resin containing colloidal silica, and an acrylic-fluorine resin. It has become.
[0052]
<Doughboard 1b>
In general, the dam plate 1b is a plywood made by laminating a veneer made of thin wood or the like with the fiber directions orthogonal to each other and pasting an odd number of sheets with an adhesive, or a plate material dedicated to a formwork such as a metal foam. The dam 1b in the present invention is not limited to this, and may be, for example, a particle board, a fiber board, a foamed synthetic resin, or the like as long as it can exhibit rigidity as a mold, ease of handling, and the like. It is possible to appropriately select a material using a combination of.
[0053]
As such a dam plate 1b, for example, in addition to those mainly using lauans, there are those using bean pine, domestic edibles, beech, bags, etc.
[0054]
In addition, as an adhesive for adhering the laminated sheet 1a to the dam plate 1b, it may be appropriately selected as long as adherability can be secured.
[0055]
That is, existing structures covering member 1 in the present embodiment, the inner, projections 11a consisting of flock-like fibrous material is provided, in a state in which the concrete 25 is filled without gaps around the projecting Okoshibutsu A laminated sheet comprising a resin layer 11 fixed to the existing concrete structure 31 and one or more coating layers fixed to the outside of the resin layer 11 via an adhesive, the outermost layer having a function of preventing dirt. The outer side surface is configured to be detachably attached to the inner side surface of the dam plate 1b.
[0056]
According to such existing structures covering member 1, as including a soft deformable free feature points on structure formed by attaching removably to the inner surface of the outer surface of the sheathing board 1b of the laminated sheet 1a Since it is comprised, the flatness in the outer surface of the coating layer 13 will be ensured sufficiently, and repair, maintenance, appearance repair, etc. of the surface portion of the existing concrete structure 31 by the laminated sheet 1a are easy and highly accurate. It is possible to do.
[0057]
[Existing structure covering method]
3-6 is sectional drawing explaining the existing structure coating method which concerns on one embodiment of this invention.
[0058]
In this embodiment, existing structures coating method is to perform by using existing structures covering member (1) as described above, is constituted by the steps up to frame members arranged step-concrete filling process Yes. Hereinafter, each process is demonstrated using these figures.
[0059]
(1) Formwork member arrangement process First, the following preparatory work as a precondition is performed.
[0060]
That is, previously factory laminated sheets 1a and sheathing board 1b of the existing structures for coating is manufactured by, while being transported to the site, the inner surface of the existing structures covering member (1) the outer surface of the loaded stacked sheets 1a existing structures covering member (1) is processed in situ in a manner that freely attached removably to.
[0061]
At this time, since these materials are all lightweight, speediness and ease in transportation and handling operations are ensured. Also, soft deformed by free laminated sheet 1a is bonded to the inner surface of the existing structures covering member (1) to have sufficient flatness, it is sufficiently flatness on the outer surface of the laminated sheet 1a Secured.
[0062]
On the other hand, floating and dirt on the surface of the existing concrete structure 31 are removed by high-pressure washing with a water jet. And although not shown in figure, the half crack pipe for guiding the water leak from a crack location to the drainage groove in the lower part is suitably attached to the surface of the existing concrete structure 31.
[0063]
At this time, although not shown, if the surface of the existing concrete structure 31 is roughened by chipping or the anchor reinforcing bars are taken from the reinforcing bars contained in the existing concrete structure 31, not only on the structure but also on the appearance. Become effective.
[0064]
These high-pressure cleaning operations and half-cracked pipe installation operations are sufficient to prevent the deterioration of the existing concrete structure 31 over a long period of time after coating and to maintain the appearance of the laminated sheet 1a for covering the existing structure. To secure. In other words, by carrying out such work, it is ensured that the maintenance effect and the appearance improvement effect of the existing concrete structure 31 can be reliably and sufficiently obtained by a single construction.
[0065]
In the state where such preparation work is completed, the following formwork member arranging step is performed.
[0066]
In other words, with a gap from the surface of the existing concrete structure 31, the existing structures covering member (1), together with the laminated sheet 1a is disposed which side is attached in a state of facing the existing concrete structure 31 side The anchor 21 is used for fixing.
[0067]
Specifically, after securing the advance work scaffolding (not shown) is placed in existing structures covering member (1) allocation diagram exactly planned from the surface of the existing concrete structure 31 by a predetermined gap with previously existing concrete structures 31 Da設anchor 21 and flap member 22, using a form tie 23 and round the separator 24, is fixed by tightening the arranged existing structures covering member (1), requires According to the above, a form support work (not shown) is constructed (see FIGS. 3 to 5).
[0068]
At this time, these materials have since both lightweight, rapidity and ease in placement work existing structures covering member 1 and the fixing operation is ensured. These sufficient flatness in the inner surface of the existing structures covering member 1 through the fixing work of the existing structures covering member (1) is ensured, thereby, the flatness of the outer surface of the laminated sheet 1a is sufficiently Secured by
[0069]
When the existing structures covering member 1 is clamped by fixed throughout the planned allocation area, the frame members arranged process is completed.
[0070]
(2) Concrete filling process First, the following preparatory work as a precondition is performed.
[0071]
That is, the examining and whether the quality state of the existing structures covering member (1) and anchor reinforcing bars (not shown) can sufficiently withstand the pouring of concrete 25 serving concrete 25, existing structures covering member (1) The protrusions 11 a made of flocked fiber material contained in the resin layer 11 are wetted with water to improve the familiarity of the concrete 25.
[0072]
In a state where such preparatory work is completed, the following concrete filling process is performed.
[0073]
That is, the concrete filling process, after the frame members disposing step, is to fill the existing concrete structure 31 surface and existing structures covering member (1) of the concrete 25 into the gap.
Specifically, the concrete 25 which is transported by truck a manner that filling is implanted into the gap surfaces and existing structures covering member (1) of the existing concrete structure 31 through concrete pump (not shown) ( (See FIG. 5).
[0074]
Here, the concrete 25 is driven while the surface of a predetermined work section is made to be approximately horizontal for each section, and is continuously driven until filling is completed.
[0075]
At this time, when the concrete 25 is driven in, the material is not separated as much as possible by compaction by an internal vibrator or a form vibrator, and the corner of the area related to the gap is adhered while the concrete 25 is sufficiently adhered to the anchor reinforcing bar or the like. It is possible to fill up to a maximum.
[0076]
In particular, if the use of a mold vibrating apparatus effectively, as a result of the paste content in the concrete 25 gather stand out in the vicinity of existing structures covering member 1, flocked like fiber material of the resin layer 11 Therefore, the situation in which the air layer remains inside after the covering of the existing concrete structure 31 is completed is effectively avoided.
[0077]
Moreover, it is expected to flatness on the outer surface of only the laminated sheet 1a throwing concrete 25 into the gap previously fixed existing structures covering member 1 and the surface of the existing concrete structure 31 is sufficiently ensured This ensures the speed and ease of the concrete filling process.
[0078]
As an alternative material for the concrete 25, for example, mortar or epoxy resin can be placed. However, in the case of mortar, the non-shrinkable mortar is used from the viewpoint of preventing the deterioration of the existing concrete structure 31 and maintaining the appearance of the laminated sheet 1a for covering the existing structure over a long period after coating. It is preferable to cast.
[0079]
Then, the concrete 25 is filled over the entire gap region of the existing structures covering member 1 and the surface of the existing concrete structure 31, when the curing period has ended demolded after elapse, the concrete filling process Is completed and the existing structure covering method is completed (see FIG. 6).
[0080]
That is, according to such existing structures coating method, using the existing structures covering member 1 made by sticking detachably the outer surface of the soft deformable free laminated sheet 1a on the inner surface of the end plate 1b After the mold member placing step performed in this manner, the concrete filling step is included, so that the flatness on the outer surface of the coating layer 13 and the effect of reducing the construction cost are sufficiently secured, and the existing installation by the laminated sheet 1a is provided. It becomes possible to repair and maintain the surface portion of the concrete structure 31 with ease and high accuracy.
[0081]
【The invention's effect】
According to existing structures covering member and existing structures coating method according to the present invention, so that the effect of reducing the flatness and construction cost on the outer surface of the coating layer is sufficiently obtained.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration of an existing structure covering member according to an embodiment of the present invention.
2 is a front view showing an external configuration of the existing structures covering member is applied structure in accordance with an embodiment of the present invention.
FIG. 3 is a cross-sectional view (No. 1) for explaining an existing structure covering method according to an embodiment of the present invention.
FIG. 4 is a sectional view (No. 2) for explaining the existing structure covering method according to the embodiment of the present invention.
FIG. 5 is a sectional view (No. 3) for explaining the existing structure covering method according to the embodiment of the invention.
FIG. 6 is a sectional view (No. 4) for explaining the existing structure covering method according to the embodiment of the present invention.
[Explanation of symbols]
1 existing structures covering member 1a laminated sheet 1b sheathing board 11 made of a fiber layer 11a flocked like fiber material projections 12 synthetic resin sheet 13 coated layer 14 design 21 anchor 22 Bata member 23 form tie 24 round separator 25 Concrete 31 Existing concrete structures

Claims (2)

Protrusions are provided on the inner side, and a resin layer that is fixed to the structure in a state where the solidified material is filled around the protrusions without any gap, and a coating layer that is fixed to the outer side of the resin layer via an adhesive And the outer surface of the laminated sheet consisting of
A member for covering an existing structure, which is detachably attached to the inner side surface of a formwork plate member through an adhesive ,
The coating layer is characterized in that the outermost layer is configured as one or more layers having a dirt prevention function,
Existing structures covering member. Protrusions are provided on the inner side, and a resin layer that is fixed to the structure in a state where the solidified material is filled around the protrusions without any gap, and a coating layer that is fixed to the outer side of the resin layer via an adhesive And a preparatory work for constituting an existing structure covering member by removably attaching the outer side surface of the laminated sheet consisting of the inner side surface of the formwork plate member,
With a gap from the surface of the existing structures, the existing structures covering member, the frame members arranged placing the side on which the laminated sheet is adhered in a state directed to existing structures side,
A solidifying material filling step of filling the gap with a solidifying material after the mold member arranging step;
Existing structure covering method.

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